Improvement in nut-locks



F. A.Y Basu o P.

rNut-Lacks.

N O. 133,694. Y j .Patented Dec. 10,1872l ,m Phoroilr//am/:PH/G ca/Mmssamvss Mams) UNITED STATES PATENT FFICE.

FRANCIS A. BISHOP, OF SHINGLE SPRINGS, CALIFORNIA. I

IMPROVEMENT lN NUT-LOCKS.

specifi( ation forming part of Letters Iatcnt No. 133,694, dated December 10, 1872; antedated December To all whom it may concern:

Be it known that I, FRANCIS A. BISHOP, of Shingle Springs, El Dorado county, State of lalifornia, have invented a new and Improved Nut-Lock; and I hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled-in the art to make and use the same, reference being had to the accompanying drawing forming part of this specitication, in which-f 'Figure 1 is the plan of my invention; Fig. 2

' is the plan of the bar A with the circular head h; Fig. 3 is the plan of the bar A' with the ble dimensions,`havng a circular head, h, the

said head containing a bolt-hole, o, as shown in drawing, Fig. 2. A', Fig. 3, represents a similar bar and head as irst described, except the turnedlover lips p p, which form grooves, and permit the sliding of one bar upon the other. The sliding together of the parts A A',

as shown in Fig. 1, essentially completes the lock. The parts thusfjoined to each other are Y placed upon a {ish-plate or other location, the

bolts passing through the holes o o', and the nuts are thenl screwed down upon the heads.

A part of the respective heads h h' is upset or turned closely up against a side of each nut, as shown in Fig. 4, thus presenting an obstacle which prevents the unscrewin g of the nut, while the lock itself is kept from rotating because ot' its location upon separate bolts.

By this arrangement it will be seen that nuts in pairs may be secured to their places on bolts against concussions or jarrings of the structure wherein they are used, or against any strain less than that sufficient to flatten the heads h h' to their normal condition. rIhe circular form of the heads allows the reusing of the lock many times, should the loosening` n and tightening ot' the nuts require it; or itmay be'turned up upon three sides of a square nut at once, if found necessary. 4

`Having thus described my invention, I disclaim the various parts and mechanical devices constituting my apparatus when separately considered, and when not combined as set forth. I also disclaim the turning up of a piece of thin metal against the side of a nut; but

I do claim as new and desire to secure by Letters Patent The head h having the bar A, in combina tion with the head h' and lipped bar A', as and for the purpose described.

. FRANCIS A. BISHOP. 

